Magnetic tube-sawing machine.



Patented July 18, 1916.

2 SHEETS-SHEET 1 H. M. WILSON.

MAGNETIC TUBE SAWlNG MACHINE.

APPLICATION FILED FEB. 28. 1915.

wn-uzsszs H. M. WILSON.

MAGNETIC TUBE SAWING MACHINE.

PPLICATION-map FEB. 28. 1916.

Patnted July 18, 1916.

2 SHEETS-SHEET 2- m: NDRRIS rnzns cc. Pmmnmm. wAsmur-mn, n. c.

HOWARD M. WILSON, 'OF PITTSBURGH, PENNSYLVANIA.

MAGNETIC TUBE-SAWING MACHINE.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed February 28, 1916. Serial 0. 80,958.

To all whom it may concern:

Be it known that I, HOWARD M. WILSON, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in MagneticTube- Sawing Machines, of which the followin is a full, clear, and exactdescription, re erence being had to the accompanying drawings, formingpart of this specification, in which Figure 1 is a plan view of one formof my improved tube sawing machine. Fig. 2 is a longitudinal sectionalview on the line II--II of Fig. 1. Fig. 3 is an end view of the machine.Fig. 4 is a detail sectional view showing the gears for operating thetube supporting members, and Figj 5 is a diagram showing the electricalconnections.

This invention relates to an improve ment in tube sawing machines and isdesigned to' provide a cheap and efficient device for cutting off theends of the tubes and in which the tubes are moved to the saw by meansof oscillating arms, and in which the tubes are held againstanti-friction rollers on the arms by electroma'gnets, the arrangementbeing such that the tubes are free to rotate on the rollers during thecutting operation. V

The precise nature of my invention will be best understood by referenceto the accompanying drawings which will now be described, it beingpremised, however, that various changes may be made in thedet'ails ofconstruction and general arrangement of the parts without departing fromthe spirit and scope of my invention, as defined in the appended claims.

Referring to the accompanying drawings, the reference characters 2 and 2designate longitudinal parallel continuously rotating shafts which areournal'cd in suitable bearings 3 and 3?, respectively. Mounted on theshaft 2 are the frames 4, and mounted on the shaft ,2 are similar frames4?, there being one pair of said frames at each end of each of theshafts. Journaled on'pins in the upper portion of each of the frames 4are rollers 5, there being two such rollers for each frame. The frames 4are also provided with similar rollers 5 for the reception of a tube 6,the ends of which are adapted to be cut 0E by saws 7 and 8 at oppositeends of the machine, and which; may be driven from any suitable sourceof power. The frames 4 on the shaft 2 are close enough to each other totake in the shortest tube to be cut by the machine, so that a tube whichis being cut will be supported on the rollers 5 in the frame 4. This isalso true of the frames 4*. Connected to the shaft 2 is a pinion 10which meshes with a gear wheel 11 journaled in hearings in the frame 4,and which gear wheel meshes with pinions 12 on the spindles of the rolls5, the arrangement being such that the rolls 5 in one of the frames willbe continuously rotated to rotate the tube supported thereon. I haveonly shown the rollers in one of the frames 4 connected to be positivelydriven which is sufficient to rotate the tube, but if desired therollers on the other frame 4 can beconnected in a similar manner. One ofthe frames 4* is also provided with suitable gearing driven by the shaft2 and to which I have given the same reference characters with theletter a affixed.

13 designates a motor which is connected to the shaft 2 by suitablespeed reducing gears within the casing 14. This shaft 2 is connected tothe shaft 2 by means of a to this rock shaft are a plurality of levers19 which are connected by means of links20 to the frames 4 and 4, sothat the frames 4' and 4 will be simultaneously rocked with the shaft17. Connected to the shaft 17 is a slotted lever 21 which is connectedby means of a crank pin 21 with a crank shaft 22 having a crank 23. Thecrank shaft 22 is provided with a gear wheel 24, the teeth of which areadapted to mesh with the teeth of the gear wheel 25, the gear wheel 25having a blank space 2 6,while some of the teeth of the gear wheel 24are cut away to engage the blank space 26 on the wheel 25;

the arrangement being such that the gear.

wheel 24 is rotated one revolution for each revolutionof the gear wheel25 the gear wheel 25 being continuously rotated while the gear wheel 24is intermittently rotated for the purpose hereinafter described. The

gear wheel 25 is rotatably mounted on the rock shaft 17, and connectedto this gear wheel is a gear wheel 27 which meshes with the' pinion 28on the shaft 2*.

Connected to each of the frames 4 and 4 are brackets 29 each of whichsupports a magnet 30.

31 are segmental contact plates, there being one set of such contactplates connected to each bracket and which are in turn con nected to theterminals of the magnets supported on their respective brackets. Mountedtransversely of the machine at the proper height are a plurality ofskids 32 over which the tubes are adapted to be rolled when fed to themachine. Connected to these skids adjacent to thevarious rock frames 4and 4 are brackets 33, and connected to these brackets, but insulatedtherefrom are brushes 34 which are connected to a suitable source ofelectrical energy, the brushes being arranged to contact with the plates31 to energize the magnets when they are in predetermined positions, ashereinafter described.

The operation of the device is as follows: The tubes to be cut away arefirst rolled down the skid to the dotted line position shown in Fig. 3,the rock arms 4 being shifted to the position shown in dotted lines andat which time the brushes 84 will be in contact with the plates 31 sothat the magnets will be energized to hold the tube in position betweenthe rollers. As soon as the tube has been moved to the dotted lineposition, the friction of the rollers will cause the tube to rotate onthe rollers; the rock arms are then shifted to full line position bymeans of the crank 23 at which time the teeth of the gear wheel 24 willbe in mesh with the teeth 25 to move the frames to the full lineposition. As soon as these frames have reached this position the blankspace 26 will engage the cut-away portion of the gear wheel 24, so thatthe tube will remain in'the full line position during the period thatthe blank space 26 passes over the cut away portion of the wheel 24,which will be sufficient time to cut off the end of the tube by means ofthe saw 7. As soon as the teeth 25 again engage the teeth of the wheel24, the frames 4 and 4 will be rocked to the left to move the tubetoward the skids 32, and just before the tube reaches the skids theelectrical connections to the magnets 30 will be broken so that the tubewill roll away from the frames 4 toward the frames 4. The tube 6 willthen be moved longitudinally to theright or left to bring the end to becut in proper alinement with the saw 8 and will be conveyed thereto bymeans of the frames 5 the operation of which will be precisely the sameas the operation of the frames 4.

The advantages of my invention result from the provision ofelectro-magnetical devices for automatically conveying a tube to be cutto the cutting saw and retaining it in position with relation to the sawby means of electromagnets and shifting the tube from its positionadjacent to the saw after the tube has been cut and then breaking theelectrical connections to release the tube. Further, from the provisionof means to rotate the tube during the time that it is in properrelation with the saw to be out, thus insuring a square cut on the endof the tube. Further a much smaller saw can be used than when the tubeis cut by passing the saw therethrough.

I claim:

1. A tube-sawing machine comprising a saw, means for moving a tube to becut into position with relation to the saw, and electro-magnetic meansfor retaining the tube in position with relation to the saw;substantially as described.

2. A tube-sawing machine comprising a rotary saw, means for moving thetube to be cut into position with relation to the saw, means to rotatethe tube, and electro-magnetic means for retaining the tube in contactwith the rotating means; substantially as described.

8. A tube-sawing machine comprising a saw, electro-magnetic means formoving the tube to be cut into position with relation to the saw, androllers for rotatingthe tube, said electro-magnetic means being alsoarranged to hold the tube in frictional contact with the rollers;substantially as described.

4. A tubesawing machine, comprising a plurality of rocking frames, tubesupporting rollers on said frames, means to rotate said rollers, meansto intermittently rock said frames to deliver the tube to the saw and toretain the tube in cutting relation to the saw, and electro-magneticmeans for holding the tube in contact with the rollers during a portionof the travel with the rocking frames; substantially as described.

5. A tube-sawing machine, comprising a rotary saw, a plurality of rockframes, means for intermittently rocking said frames and tube supportingrollers on said frames, means for rotating some of said rollers torotate the'tube, an electro-magnet carried by one of said frames andarranged to hold the tube in contact with the rollers, and electricalconnections for said magnet arranged to permit the circuit to flowthrough the magnet during a portion of the travel of the frame and tocut out said circuit in another portion of its travel; substantially asdescribed.

In testimony whereof, I have hereunto set my hand.

HOWARD M. WILSON. Witnesses:

J. M. HALL,

J. H. J oHNsoN.

Copies of this patent may be obtained for five cents each, by addressingthe commissioner of Patents,

Washington, D. G. e

